{"id":"e5423e2c-ef41-48c4-91d3-dbc9bcf9d226","shortId":"8BAuhu","kind":"x402","title":"Check wallet/contract address security via x402-paid DeFi Intelligence API","tagline":"Check wallet/contract address security via x402-paid DeFi Intelligence API","description":"The `/defi/address` endpoint on the DeFi Intelligence API checks whether a given wallet or contract address is associated with malicious activity, scams, or other security risks. It is one of 26 DeFi-focused endpoints hosted at defi.hugen.tokyo, all payable per-call via the x402 protocol at $0.01 USDC on Base. No API keys or rate limits are required — payment is handled inline with each request.\n\nThe endpoint accepts a single required query parameter `address` (the wallet or contract address to check) and returns a JSON response. The x402 challenge confirms the endpoint is live and indicates the address is evaluated for malicious activity (the sample challenge includes fields like `is_malicious_address` and `contract_address`). The broader API suite covers token audits, NFT security, rug-pull detection, phishing checks, bridge routing, protocol analytics (TVL, fees, DEX volume), gas prices, and transaction simulation across multiple EVM chains and Solana.\n\nAlternative access methods are available: a broker API at discovery.hugen.tokyo (use an API key, no wallet needed), an MCP server at mcp.hugen.tokyo, and a Python SDK (`pip install x402-pay`). The OpenAPI 3.1 spec is published at `/openapi.json` and interactive docs are at `/docs`. Response schemas for individual endpoints are not detailed in the spec beyond validation errors.","tags":[],"capabilities":["address-security-check","malicious-address-detection","x402-payment","evm-address-audit","defi-security","per-call-micropayment","no-api-key-required","openapi-3.1-spec"],"categories":["defi","security","blockchain"],"synonyms":["wallet security check","address risk score","malicious address lookup","contract address audit","DeFi address screening","wallet reputation check","blockchain address security"],"warnings":["Response schema for /defi/address is not defined in the OpenAPI spec (empty schema object)","Example response is inferred from x402 challenge fields and may be incomplete","No dedicated pricing page found; price ($0.01 USDC on Base) is only stated in the 402 challenge","Root URL returns 404; documentation only available at /docs"],"endpointUrl":"https://defi.hugen.tokyo/defi/address","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"},"payTo":"4du4AfkjJEwch2zk3shkPJVZfyJHNDnNjEWC6AboaS5Z","amount":"5000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}]},"qualityScore":"0.550","qualityRationale":"The endpoint is live (402 challenge captured) with a published OpenAPI 3.1 spec and interactive docs. However, the response schema for /defi/address is empty in the spec, and no example responses are documented. The example response is inferred from the x402 challenge sample fields, which may not represent the full 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'/docs':218 '/openapi.json':212 '0.01':71 '26':53 '3.1':207 'DeFi address screening' 'accept':92 'access':175 'across':168 'activ':43,127 'address':3,14,38,98,103,122,136,139 'address risk score' 'address-security-check' 'altern':174 'analyt':158 'api':11,22,30,76,142,181,186 'associ':40 'audit':146 'avail':178 'base':74 'beyond':230 'blockchain address security' 'bridg':155 'broader':141 'broker':180 'call':65 'chain':171 'challeng':113,130 'check':1,12,31,105,154 'confirm':114 'contract':37,102,138 'contract address audit' 'cover':144 'defi':9,20,28,55 'defi-focus':54 'defi-security' 'defi.hugen.tokyo':60 'detail':226 'detect':152 'dex':161 'discovery.hugen.tokyo':183 'doc':215 'endpoint':25,57,91,116,223 'error':232 'evalu':124 'evm':170 'evm-address-audit' 'fee':160 'field':132 'focus':56 'gas':163 'given':34 'handl':85 'host':58 'includ':131 'indic':120 'individu':222 'inlin':86 'instal':201 'intellig':10,21,29 'interact':214 'json':109 'key':77,187 'like':133 'limit':80 'live':118 'malici':42,126,135 'malicious address lookup' 'malicious-address-detection' 'mcp':192 'mcp.hugen.tokyo':195 'method':176 'multipl':169 'need':190 'nft':147 'no-api-key-required' 'one':51 'openapi':206 'openapi-3.1-spec' 'paid':8,19 'paramet':97 'pay':204 'payabl':62 'payment':83 'per':64 'per-cal':63 'per-call-micropayment' 'phish':153 'pip':200 'price':164 'protocol':69,157 'publish':210 'pull':151 'python':198 'queri':96 'rate':79 'request':89 'requir':82,95 'respons':110,219 'return':107 'risk':48 'rout':156 'rug':150 'rug-pul':149 'sampl':129 'scam':44 'schema':220 'sdk':199 'secur':4,15,47,148 'server':193 'simul':167 'singl':94 'solana':173 'spec':208,229 'suit':143 'token':145 'transact':166 'tvl':159 'usdc':72 'use':184 'valid':231 'via':5,16,66 'volum':162 'wallet':35,100,189 'wallet reputation check' 'wallet security check' 'wallet/contract':2,13 'whether':32 'x402':7,18,68,112,203 'x402-paid':6,17 'x402-pay':202 'x402-payment'","prices":[{"id":"b35d1715-1d0c-43ac-90a0-da17eeaf19c5","listingId":"e5423e2c-ef41-48c4-91d3-dbc9bcf9d226","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"},"payTo":"4du4AfkjJEwch2zk3shkPJVZfyJHNDnNjEWC6AboaS5Z","amount":"5000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:37.617Z"}],"sources":[{"listingId":"e5423e2c-ef41-48c4-91d3-dbc9bcf9d226","source":"x402_bazaar","sourceId":"https://defi.hugen.tokyo/defi/address","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:37.617Z","lastSeenAt":"2026-04-22T05:32:29.897Z"}],"details":{"listingId":"e5423e2c-ef41-48c4-91d3-dbc9bcf9d226","quickStartSnippet":"# Using the x402-pay Python SDK\npip install x402-pay\n\nimport x402_pay\nresp = x402_pay.get(\n    'https://defi.hugen.tokyo/defi/address?address=0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18'\n)\nprint(resp.json())","exampleRequest":{"url":"https://defi.hugen.tokyo/defi/address?address=0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18","method":"GET"},"exampleResponse":{"contract_address":false,"is_malicious_address":false},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint requires a single query parameter 'address' described as 'Wallet or contract address to check'","source_url":"https://defi.hugen.tokyo/docs"},{"claim":"The API has 26 DeFi security and data endpoints with one x402 payment per call","source_url":"https://defi.hugen.tokyo/docs"},{"claim":"Payment is $0.01 USDC on Base per call","source_url":"https://defi.hugen.tokyo/defi/address"},{"claim":"Alternative access via broker, MCP, and Python SDK (x402-pay) is available","source_url":"https://defi.hugen.tokyo/defi/address"},{"claim":"The x402 challenge sample includes is_malicious_address and contract_address fields","source_url":"https://defi.hugen.tokyo/defi/address"}],"useCases":["Screen a wallet address for known malicious activity before interacting with it","Automate address security checks in a DeFi trading bot or portfolio manager","Verify counterparty addresses in peer-to-peer crypto transactions","Integrate address risk assessment into a compliance or AML workflow","Agent-driven due diligence on contract addresses before token approvals"],"bestFor":["AI agents needing on-demand address security checks with no setup","DeFi applications that want per-call pricing without API key management","Developers building security tooling across multiple EVM chains"],"notFor":["Bulk screening of millions of addresses (per-call pricing adds up)","Users who need detailed forensic chain analysis or transaction tracing","Applications that cannot settle USDC payments on Base"],"kindDetails":{},"updatedAt":"2026-04-22T02:19:39.329Z"}}